SB Partners 10-K 22 Apr 14 2013 Q1 Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013
Document and Entity Information [Abstract]	'
Entity Registrant Name	'SB PARTNERS
Entity Central Index Key	'0000087047
Current Fiscal Year End Date	'--12-31
Entity Well-known Seasoned Issuer	'No
Entity Voluntary Filers	'No
Entity Current Reporting Status	'No
Entity Filer Category	'Non-accelerated Filer
Entity Public Float	$0
Entity Common Stock, Shares Outstanding	0
Document Fiscal Year Focus	'2013
Document Fiscal Period Focus	'Q1
Document Type	'10-K
Amendment Flag	'false
Document Period End Date	31-Mar-13

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2013	Dec. 31, 2012
Real estate, at cost	'	'
Land	$1,985,000	$1,985,000
Buildings, furnishings and improvements	18,648,009	18,581,164
Less - accumulated depreciation	-4,420,952	-3,931,815
Total Real Estate Assets	16,212,057	16,634,349
Investment in Sentinel Omaha, LLC, net of reserve for fair value of $0 and $3,346,444 at December 31, 2012 and 2011, respectively	0	0
Total Investments	16,212,057	16,634,349
Other Assets -	'	'
Cash and cash equivalents	624,191	402,874
Cash in escrow	500,144	500,084
Other	146,042	202,806
Total assets	17,482,434	17,740,113
Liabilities:	'	'
Mortgage note and unsecured loan payable	19,967,009	19,983,464
Accounts payable	364,346	238,811
Tenant security deposits	115,223	112,425
Accrued expenses	1,935,870	1,202,188
Total liabilities	22,382,448	21,536,888
Units of partnership interest without par value;	'	'
Limited partner - 7,753 units	-4,880,946	-3,777,849
General partner - 1 unit	-19,068	-18,926
Total partners' deficit	-4,900,014	-3,796,775
Total liabilities and partners' deficit	$17,482,434	$17,740,113

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
CONSOLIDATED BALANCE SHEETS [Abstract]	'	'
Reserve for fair value of investments in Sentinel Omaha, LLC	$1,668,952	$0
Limited partner units (in shares)	7,753	7,753
General partner units (in shares)	1	1

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues:	'	'	'
Base rental income	$1,791,143	$1,765,696	$1,748,901
Other rental income	717,771	704,066	721,849
Interest on short-term investments and other	360	91	30,156
Total revenues	2,509,274	2,469,853	2,500,906
Expenses:	'	'	'
Real estate operating expenses	465,085	431,796	456,646
Interest on mortgage notes and unsecured loan payable	1,084,261	1,091,904	1,085,761
Depreciation and amortization	545,223	550,379	532,108
Real estate taxes	511,460	484,254	496,015
Management fees	857,041	858,926	756,013
Other	149,443	157,987	199,999
Total expenses	3,612,513	3,575,246	3,526,542
Loss from operations	-1,103,239	-1,105,393	-1,025,636
Equity in net loss of investment	1,668,952	-3,346,444	-762,632
Reserve for value of investment	-1,668,952	3,346,444	762,632
Loss from continuing operations	-1,103,239	-1,105,393	-1,025,636
(Loss) income from discontinued operations	0	0	-2,305
Net loss	-1,103,239	-1,105,393	-1,027,941
Loss allocated to general partner	-142	-143	-133
Loss allocated to limited partners	($1,103,097)	($1,105,250)	($1,027,808)
(Loss) earnings per unit of limited partnership interest (basic and diluted)	'	'	'
Continuing operations (in dollars per share)	($142.30)	($142.58)	($132.29)
Discontinued operations (including loss on sale) (in dollars per share)	$0	$0	($0.30)
Net loss (in dollars per share)	($142.30)	($142.58)	($132.59)
Weighted Average Number of Units of Limited Partnership Interest Outstanding (in shares)	7,753	7,753	7,753

CONSOLIDATED_STATEMENTS_OF_CHA

CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS' CAPITAL (DEFICIT) (USD $)	Limited Partners [Member]	Limited Partners [Member]	Limited Partners [Member]	Limited Partners [Member]	General Partner [Member]	General Partner [Member]	General Partner [Member]	General Partner [Member]	Total
	Capital Amount [Member]	Cumulative Cash Distributions [Member]	Accumulated Earnings (Losses) [Member]		Capital Amount [Member]	Cumulative Cash Distributions [Member]	Accumulated Earnings (Losses) [Member]
Balance at Dec. 31, 2010	$119,968,973	($111,721,586)	($9,892,178)	($1,644,791)	$10,000	($26,364)	($286)	($18,650)	'
Balance (in shares) at Dec. 31, 2010	7,753	'	'	'	1	'	'	'	'
Net loss for the year	0	0	-1,027,808	-1,027,808	0	0	-133	-133	-1,027,941
Balance at Dec. 31, 2011	119,968,973	-111,721,586	-10,919,986	-2,672,599	10,000	-26,364	-2,419	-18,783	'
Balance (in shares) at Dec. 31, 2011	7,753	'	'	'	1	'	'	'	'
Net loss for the year	0	0	-1,105,250	-1,105,250	0	0	-143	-143	-1,105,393
Balance at Dec. 31, 2012	119,968,973	-111,721,586	-12,025,236	-3,777,849	10,000	-26,364	-2,562	-18,926	-3,796,775
Balance (in shares) at Dec. 31, 2012	7,753	'	'	'	1	'	'	'	'
Net loss for the year	0	0	-1,103,097	-1,103,097	0	0	-143	-142	-1,103,239
Balance at Dec. 31, 2013	$119,968,973	($111,721,586)	($13,128,333)	($4,880,946)	$10,000	($26,364)	($2,704)	($19,068)	($4,900,014)
Balance (in shares) at Dec. 31, 2013	7,753	'	'	'	1	'	'	'	'

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Flows From Operating Activities:	'	'	'
Net loss	($1,103,239)	($1,105,393)	($1,027,941)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:	'	'	'
Net loss on sale of investment in real estate property	0	0	0
Equity in net loss of investment	-1,668,952	3,346,444	762,632
Reserve for fair value of investment	1,668,952	-3,346,444	-762,632
Depreciation and amortization	545,223	550,379	532,108
Net decrease (increase) in operating assets	678	513	2,636
Net decrease in operating assets in discontinued operation	0	0	0
Net increase (decrease) in operating liabilities	125,535	-12,213	91,658
Net increase in tenant security deposits	2,798	2,798	2,797
Net increase in accrued expenses	733,682	739,229	462,959
Net (decrease) in operating liabilities in discontinued operation	0	0	0
Net cash provided by operating activites	304,677	175,313	64,217
Cash Flows From Investing Activities:	'	'	'
Interested earned on capital reserve escrow account	-60	-50	-34
Payment to capital reserve escrow account	0	0	-500,000
Capital (additions) reimbursements to real estate owned	-66,845	0	-20,646
Net cash (used in) provided by investing activites	-66,905	-50	-520,680
Cash Flows From Financing Activities:	'	'	'
Repayment of mortgage notes payable	-16,455	-86,106	-11,930,430
Payment of deferred financing cost	0	0	-231,490
Net cash (used in) financing activities	-16,455	-86,106	-12,161,920
Net change in cash and cash equivalents	221,317	89,157	-12,618,383
Cash and cash equivalents at beginning of year	402,874	313,717	12,932,100
Cash and cash equivalents at end of year	624,191	402,874	313,717
Supplemental disclosure of cash flow information:	'	'	'
Cash paid during the year for interest	$784,261	$786,904	$886,922

ORGANIZATION_AND_SIGNIFICANT_A

ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES	12 Months Ended
	Dec. 31, 2013
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Abstract]	'
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES	'
	SB PARTNERS
	Notes to Consolidated Financial Statements
	(1) ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES
	SB Partners, a New York limited partnership, and its subsidiaries (collectively, the "Partnership"), have been engaged since April 1971 in acquiring, operating, and holding for investment a varying portfolio of real estate interests.  SB Partners Real Estate Corporation (the "General Partner") serves as the general partner of the Partnership.
	The significant accounting and financial reporting policies of the Partnership are as follows:
		(a)	The accompanying consolidated financial statements include the accounts of SB Partners and its subsidiaries.  All significant intercompany accounts and transactions have been eliminated.  The consolidated financial statements are prepared using the accrual basis of accounting in accordance with accounting principles generally accepted in the United States of America.  Revenues are recognized as earned and expenses are recognized as incurred.  The preparation of financial statements in conformity with such principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
		(b)	In connection with the mortgage financing on certain of its properties, the Partnership placed the assets and liabilities of the properties into single asset limited partnerships, limited liability companies or land trusts which hold title to the properties.  The Partnership has effective control over such entities and holds 100% of the beneficial interest.  Accordingly, the financial statements of these subsidiaries are consolidated with those of the Partnership.
		(c)	Depreciation of buildings, furnishings and improvements is computed using the straight-line method of depreciation, based upon the estimated useful lives of the related properties, as follows:
	Buildings and Improvements    5 to 40 years
	Furnishings                 5 to  7 years
	Investments in real estate are carried at historical cost and reviewed periodically for impairment. Expenditures for maintenance and repairs are expensed as incurred.  Expenditures for improvements, renewals and betterments, which increase the useful life of the real estate, are capitalized.  Upon retirement or sale of property, the related cost and accumulated depreciation are removed from the accounts.  Amortization of deferred financing and refinancing costs is computed by amortizing the cost on a straight-line basis over the terms of the related mortgage notes.
		(d)	Real estate properties are regularly evaluated on a property by property basis to determine if it is appropriate to write down carrying values to recognize an impairment of value.  Impairment is determined by calculating the sum of the estimated undiscounted future cash flows including the projected undiscounted future net proceeds from the sale of the property.  In the event such sum is less than the net carrying value of the property, the property will be written down to estimated fair value.  Based on the Partnership's long-term hold strategy for its investments in real estate, the carrying value of its properties at December 31, 2013 is estimated to be fully realizable.
		(e)	Real estate held for sale is carried at the lower of cost or fair value less selling costs.  Upon determination that a property is held for sale, depreciation of such property is no longer recorded.
		(f)	For financial reporting purposes, the Partnership considers all highly liquid, short-term investments with original maturities of three months or less when purchased to be cash equivalents.
		(g)	The Partnership accounts for its investment in Sentinel Omaha, LLC at fair value.   Determination of the fair value of Omaha involves numerous estimates and subjective judgments that are subject to change in response to current and future economic and market conditions, including, among other things, demand for residential apartments, competition, and operating cost levels such as labor, energy costs and real estate taxes.  Judgments regarding these factors are not subject to precise quantification or verification and may change from time to time as economic and market factors change.  (see Note 5)
		(h)	Tenant leases at the multifamily properties owned by Omaha generally have terms of one year or less.  Rental income at the multifamily properties is recognized when earned pursuant to the terms of the leases with tenants.  Tenant leases at the industrial flex and warehouse distribution properties have terms that exceed one year.  Rental income at the industrial flex and warehouse distribution properties is recognized on a straight-line basis over the terms of the leases.
		(i)	Gains on sales of investments in real estate are recognized in accordance with accounting principles generally accepted in the United States of America applicable to sales of real estate which require minimum levels of initial and continuing investment by the purchaser, and certain other tests be met, prior to the full recognition of profit at the time of the sale.  When the tests are not met, gains on sales are recognized on either the installment or cost recovery methods.
		(j)	Each partner is individually responsible for reporting its share of the Partnership's taxable income or loss.  Accordingly, no provision has been made in the accompanying consolidated financial statements for Federal, state or local income taxes.
		(k)	Net income per unit of partnership interest has been computed based on the weighted average number of units of partnership interest outstanding during each year.  There were no potentially dilutive securities outstanding during each year.
		(l)	The Partnership is engaged in only one industry segment, real estate investment, and therefore information regarding industry segments is not applicable and is not included in these consolidated financial statements.

INVESTMENT_MANAGEMENT_AGREEMEN

INVESTMENT MANAGEMENT AGREEMENT	12 Months Ended
	Dec. 31, 2013
INVESTMENTS MANAGEMENT AGREEMENT [Abstract]	'
INVESTMENT MANAGEMENT AGREEMENT	'
	(2) INVESTMENT MANAGEMENT AGREEMENT
		The Partnership entered into a management agreement with the General Partner.  Under the terms of this agreement, the General Partner is responsible for the acquisition, management and disposition of all investments, as well as performance of the day-to-day administrative operations and provision of office space for the Partnership.
	For these services, the General Partner receives a management fee equal to 2% of the average amount of capital invested in real estate plus cumulative mortgage amortization payments, and 0.5% of capital not invested in real estate, as defined in the partnership agreement.  The management fee amounted to $857,041, $858,926 and $756,013 for the years ended December 31, 2013, 2012, and 2011, respectively. Of the amounts earned in 2013, 2012 and 2011, $430,618 and $437,293, respectively has been deferred while the obligations under the Loan Agreement are outstanding.  The deferred amounts are included in accrued expenses on the balance sheet as of December 31, 2013, and 2012. In addition, the General Partner is entitled to 25% of cash distributions in excess of the annual distribution preference, as defined in the partnership agreement.  No such amounts were due for the years ended December 31, 2013, 2012 or 2011.

INVESTMENTS_IN_REAL_ESTATE

INVESTMENTS IN REAL ESTATE	12 Months Ended
	Dec. 31, 2013
INVESTMENTS IN REAL ESTATE [Abstract]	'
INVESTMENTS IN REAL ESTATE	'
	(3) INVESTMENTS IN REAL ESTATE
	During 2013 and 2012, the Partnership owned an industrial flex property in Maple Grove, Minnesota and a warehouse distribution property in Lino Lakes, Minnesota.
	The following is the cost basis and accumulated depreciation of the real estate investments owned by the Partnership as of December 31, 2013 and 2012:
					Real Estate at Cost
	Type			Description	12/31/13		12/31/12
		No. of	Year of
		Prop.	Acquisition
	Industrial flex property	1	2002	60,345	$	5,336,973	$	5,270,128
	Warehouse distribution property	1	2005	226,000		15,296,036		15,296,036
	Total cost					20,633,009		20,566,164
	Less: Accumulated depreciation					-4,420,952		-3,931,815
	Net book value				$	16,212,057	$	16,634,349

INVESTMENT_IN_SENTINEL_OMAHA_L

INVESTMENT IN SENTINEL OMAHA, LLC	12 Months Ended
	Dec. 31, 2013
INVESTMENT IN SENTINEL OMAHA, LLC [Abstract]	'
INVESTMENT IN SENTINEL OMAHA, LLC	'
	In 2007, the Registrant made an investment in the amount of $37,200,000 representing a thirty percent ownership interest in Sentinel Omaha, LLC ("Omaha").  Omaha is a real estate investment company which as of December 31, 2013 owns 14 multifamily properties in 10 markets.  Omaha is an affiliate of the Partnership's general partner.  The Omaha annual audited financial statements are filed as an exhibit to the Partnership's annual Form 10-K filed with the SEC.
	With respect to its investment in Omaha, the Registrant elected to early adopt Accounting Standards Codification Topic 825.  Accordingly, the investment is presented at fair value.  Early adoption was elected, in part, because the audited financial statements of Omaha are presented at fair value and it was believed that a similar presentation would best reflect the value of the Registrant's investment from its inception.
	The following are the audited condensed financial statements (000's omitted) of Omaha as of December 31, 2013 and 2012 and for each of the three years in the period ended December 31, 2012.
	Balance Sheet	2013		2012
	Investment in real estate properties, at fair value	$	267,600	$	302,900
	Other assets		9,996		7,056
	Debt		-266,254		-305,623
	Other liabilities		-5,779		-5,512
	Members' equity (deficit)	$	5,563	$	-1,179
	Statement of Operations	2013		2012		2011
	Rent and other income	$	39,179	$	42,539	$	45,943
	Real estate operating expenses		-20,070		-22,526		-24,463
	Other expenses		-13,187		-15,047		-17,245
	Net unrealized gains and (losses)		26,691		-12,727		1,379
	Net realized (losses)		-25,871		-4,573		-8,156
	Net income (loss)	$	6,742	$	-12,334	$	-2,542
	Determination of the fair value of Omaha involves numerous estimates and subjective judgments that are subject to change in response to current and future economic and market conditions, including, among other things, demand for residential apartments, competition, and operating cost levels such as labor, energy costs, real estate taxes and market interest rates.  Judgments regarding these factors are not subject to precise quantification or verification and may change from time to time as economic and market factors change.
	Estimated fair value is based on the criteria outlined in Financial Accounting Standards Board Accounting Standard Codification No. 820-10, "Fair Value Measurements and Disclosures" (ASC 820-10).  ASC 820-10 established a "three-tier" valuation hierarchy to prioritize the assumptions used in valuation techniques to measure fair value.  The three levels of fair value hierarchy under ASC 820-10 are described below:
	Level 1 - Unadjusted quoted prices in active markets that are accessible at the measurement date for identical unrestricted assets or liabilities;
	Level 2 - Quoted prices in active markets for similar assets and liabilities or quoted prices in less active dealer or broker markets;
	Level 3 - Prices or valuations that require inputs that are both significant to the fair value measurement and are unobservable.
	Estimated fair value calculations were prepared by Omaha's management utilizing Level 3 inputs.
	Further, the investment in Omaha is not consolidated because other investors have substantive ownership and participative rights regarding Omaha's operations and therefore control does not vest in the Registrant.  Were the Partnership deemed to control Omaha, it would have to be consolidated and therefore would impact the financial statements and related ratios.
	OnSeptember 30, 2013, Omaha executed an amendment and restatement of its unsecured loan toDecember 31, 2017.  The amendment and restatement, among other items, requires Omaha to make specific periodic principal payments on the unsecured loan at scheduled dates through December 31, 2017.  It has also reduced the pay rate on a portion of the unsecured loan to a floating rate of 200 basis points over LIBOR while increasing the additional accrual rate on the same portion of the unsecured loan to 500 basis points over LIBOR.  However, the aforementioned accrued interest will be forgiven each time Omaha pays the above mentioned required principal payment timely, as defined in the loan agreement.  Omaha is still precluded from paying distributions to its investors until the unsecured loan is paid in full. As a result of the aforementioned, the Partnership does not anticipate receiving any distributions from Omaha during the foreseeable future and has reserved 100% of the reported value of its investment in Omaha on the balance sheet as of December 31, 2013 and 2012. Omaha reported a negative equity balance as of December 31, 2012 due to the additional loss in value of its real estate properties during 2012.  For 2012, Registrant's share of the net loss from Omaha exceeded Registrant's remaining unreserved equity investment as of December 31, 2011.  Registrant recorded the loss for 2012 only to the extent the unreserved equity investment was reduced to zero. During 2013, Omaha reported net income of $6,742,317 of which Registrant's share was $2,022,695.  However, for 2013, Registrant's share of the net income from Omaha was reduced for the unrecognized loss from 2012 of $353,743.

MORTGAGE_NOTES_AND_UNSECURED_L

MORTGAGE NOTES AND UNSECURED LOAN PAYABLE	12 Months Ended
	Dec. 31, 2013
MORTGAGE NOTES AND UNSECURED LOAN PAYABLE [Abstract]	'
MORTGAGE NOTES AND UNSECURED LOAN PAYABLE	'
	(6) MORTGAGE NOTES AND UNSECURED LOAN PAYABLE
	Mortgage notes payable consist of the following non-recourse first liens:
	Net Carrying Amount
	December 31,
	Property				Maturity Date					2013		2012
			Interest Rate					Amount Due
			Rate			Annual		at Maturity
						Installment
						Payments
	Mortgage note and unsecured loan payable:
	Lino Lakes (a)			5.80%	October, 2015	$	580,000	$	10,000,000	$	10,000,000	$	10,000,000
	Bank Loan (b):
	Note A										3,967,009		3,983,464
	Note B										6,000,000		6,000,000
										$	19,967,009	$	19,983,464
	(a) Annual installment payments include interest only.
		(b) On September 17, 2007, the Partnership entered into a bank loan (the "Loan") with a bank ("Holder") in the amount of $22,000,000, which matured on October 1, 2008 and provided for interest only monthly payments based upon LIBOR plus 1.95%.  The Holder of the unsecured debt formally
	extended the maturity to February 28, 2009 and had entered into discussions as to terms for extending the debt on a longer term basis.
	On April 29, 2011, the Holder of the unsecured credit facility and the Partnership executed a new Loan Agreement ("Loan Agreement") on the following terms:
		1)	In connection with the execution of the Loan Agreement, the Partnership was required to make an immediate payment to Holder of $11,930,430, reducing the balance due under the unsecured credit facility to $10,069,570.  The payment was made from proceeds resulting from the sale of 175 Ambassador Drive.  Additional proceeds from the sale were used to pay Holder's legal and appraisal  costs and to fund a reserve account for future tenant improvement and leasing costs, as needed.   The remaining outstanding obligation in the amount of $10,069,570 was divided into two notes ("Note A" and "Note B;" together, the "Notes").
		2)	Note A in the amount of $4,069,570 has a maturity of July 31, 2014.  The Partnership has two 1-year options to extend the maturity if certain conditions are satisfied.  Note A requires monthly payments of accrued interest at an annual fixed rate of 5% until paid in full.  If extended, the Partnership is required to make an additional fixed principal payment of $9,570 on April 1, 2015 and $30,000 monthly thereafter until paid in full.
		3)	Note B in the amount of $6,000,000 has a maturity date of April 29, 2018.  The Partnership has 3 1-year options to extend the maturity date if certain conditions are satisfied.  Note B accrues interest at an annual fixed rate of 5% but only until all interest and principal have been paid in full on Note A.  Thereafter Note B does not accrue any interest.  Payments of interest and principal are deferred until the Partnership's investment in Sentinel Omaha LLC ("Omaha") pays distributions to the Partnership.  Distributions from Omaha would be used first to pay accrued interest on the Note B obligation, then principal on the Note B obligation.  If there are no distributions from Omaha prior to the Note B maturity, all interest and principal is due at maturity, subject to the above mentioned extensions.
		4)	The Notes may be voluntarily prepaid upon notice to the Holder, subject to certain requirements as to the application of payments. The Partnership's obligations under the Notes may be accelerated upon default.
		5)	Until the Partnership's obligations under the Notes are satisfied in full, the Partnership is required to pay a portion of its net operating income (after payment of certain permitted expenses), and the net proceeds from the sale, transfer or refinancing of its remaining properties and investments, toward the Notes while retaining the other portion to increase cash reserves. During June 2013 and May 2012, the Partnership paid $16,455 and $ 86,106 to the Holder to pay down a portion of the outstanding balance of Note A. The proceeds represented excess net operating income, as defined, for the years ended April 30, 2013 and 2012. While the obligations under the Notes are outstanding the Partnership is precluded from making distributions to its partners.
		6)	The Partnership, its general partner and the Holder also entered into a Management Subordination Agreement accruing a portion of the investment management fee payable by the Partnership to its general partner so long as the Notes remain outstanding.   As of December 31, 2013 and 2012, $1,126,703 and $693,020, respectively of investment management fees have been accrued and are included in accrued expenses on the balance sheet.
		7)	As additional security for the Partnership's payment of its obligations under the Loan Agreement, the Partnership, through its wholly-owned subsidiary Eagle IV Realty, LLC, has executed a Mortgage, Security Agreement, Assignment of Leases and Rents and Fixture Financing Statement ("Eagle IV Security Agreement") and a Pledge Agreement ("Eagle IV Pledge Agreement") in favor of  Holder.  The Eagle IV Security Agreement provides Holder with a security interest on the Partnership's property located in Maple Grove, Minnesota ("Eagle IV") of up to $5,000,000.  The Eagle IV Pledge Agreement pledges to Holder the Partnership's membership interest in Eagle IV Realty, LLC, the direct owner of Eagle IV.   The Partnership has no other debt obligation secured by Eagle IV.  The Loan Agreement also provides for a negative pledge on the Partnership's remaining properties and investments.
	Scheduled principal payments on mortgage notes and unsecured loan payable are as follows:
	2013	$	3,967,009
	2014		10,000,000
	2015		-
	2016		-
	2017		6,000,000
	Thereafter		-
	Total	$	19,967,009

QUARTERLY_FINANCIAL_INFORMATIO

QUARTERLY FINANCIAL INFORMATION (UNAUDITED)	12 Months Ended
	Dec. 31, 2013
QUARTERLY FINANCIAL INFORMATION (UNAUDITED) [Abstract]	'
QUARTERLY FINANCIAL INFORMATION (UNAUDITED)	'
	(7) QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
	Year ended December 31, 2012	Revenues
				Loss from				Equity Income
				Continuing		Loss from		(Loss) on
				Operations		Continuing		Investment
						Operations
						Per Unit
	First Quarter	$	623,087	$	-272,785	$	-35.18	$	2,207,401
	Second Quarter		626,103		-296,015		-38.18		2,392,276
	Third Quarter		629,145		-266,622		-34.39		-58,597
	Fourth Quarter		630,939		-267,817		-34.55		-2,872,128
	Year ended December 31, 2011
	First Quarter	$	639,952	$	-280,521	$	-36.18	$	3,292,398
	Second Quarter		642,766		-261,154		-33.68		-1,151,234
	Third Quarter		567,187		-318,227		-41.04		-5,487,608
	Fourth Quarter		619,948		-245,491		-31.68		-

FEDERAL_INCOME_TAX_INFORMATION

FEDERAL INCOME TAX INFORMATION (UNAUDITED)	12 Months Ended
	Dec. 31, 2013
FEDERAL INCOME TAX INFORMATION (UNAUDITED) [Abstract]	'
FEDERAL INCOME TAX INFORMATION (UNAUDITED)	'
	(8) FEDERAL INCOME TAX INFORMATION (UNAUDITED)
	A reconciliation of net (loss) for financial reporting purposes to net (loss) for Federal income tax reporting purposes is as follows:
		For the Years Ended December 31,
		2013		2012		2011
	Net loss for financial reporting purposes	$	-1,103,239	$	-1,105,393	$	-1,027,941
	Adjustment to net loss on sale of investment in real estate property to reflect differences between tax and financial reporting bases of assets and liabilities		2,758,177		727,932		913,791
	Difference between tax and financial statement equity in net loss of investment		-8,773,783		-3,529,185		-4,673,857
	Accrued investment management fees, mortgage interest and partnership administrative costs not expensed for tax purposes		774,618		1,279,187		0
	Difference between tax and financial statement depreciation		-15,451		1,091		-15,831
	Net loss for Federal income tax reporting purposes	$	-6,359,678	$	-2,626,368	$	-4,803,838
	Net ordinary loss for Federal income tax reporting purposes:	$	-1,356,740	$	-1,982,373	$	-3,588,539
	Net capital (Sec. 1231) (loss) for Federal income tax reporting purposes:		-5,002,938		-643,995		-1,215,299
		$	-6,359,678	$	-2,626,368	$	-4,803,838
	Weighted average number of units of limited partnership  interest outstanding		7,753		7,753		7,753
	As of December 31, 2012 and 2011, the tax bases of the Partnership's assets and liabilities were approximately $16,333,404 and $17,953,793 of assets, and $22,382,448 and $21,536,888 of liabilities, respectively.

MANAGEMENT_SERVICES

MANAGEMENT SERVICES	12 Months Ended
	Dec. 31, 2013
MANAGEMENT SERVICES [Abstract]	'
MANAGEMENT SERVICES	'
	(9) MANAGEMENT SERVICES
		Certain affiliates of the General Partner oversee the management and operation of various real estate properties, including those owned by the Partnership.  Services performed by affiliates are billed at actual or allocated cost, percentage of revenues or net equity. For the years ended December 31, 2012, 2011 and 2010 billings to the Partnership amounting to $128,139, $129,919 and $124,482, respectively, and are included in real estate operating expenses.
	In connection with the mortgage financing of certain properties, the respective lenders required the Partnership to place the assets and liabilities of these properties into single asset limited partnerships which hold title to these properties.  A trust company affiliated with the General Partner holds the general partner interest in each single asset limited partnership as trustee for the Partnership.  For its services, the affiliate is paid an annual fee, which aggregated $54,000, $9,000 and $-in 2012, 2011, and 2010, respectively, and is based upon the trust company's standard rate schedule.

FAIR_VALUE_OF_FINANCIAL_INSTRU

FAIR VALUE OF FINANCIAL INSTRUMENTS	12 Months Ended
	Dec. 31, 2013
FAIR VALUE OF FINANCIAL INSTRUMENTS [Abstract]	'
FAIR VALUE OF FINANCIAL INSTRUMENTS	'
	(10) FAIR VALUE OF FINANCIAL INSTRUMENTS
	The Partnership's financial instruments include cash, cash equivalents, and mortgage notes payable and unsecured loan. The carrying amount of cash and cash equivalents are reasonable estimates of fair value.  Mortgage notes and unsecured loans payable have been valued by discounting future payments required under the terms of the obligations at rates currently available to the Partnership for debt with similar maturities, terms and underlying collateral.  The fair value of the mortgage notes and unsecured loan payable is estimated to be $19,967,009 and $19,983,464 at December 31, 2012 and 2011, respectively.

COMMITMENTS_AND_CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	12 Months Ended
	Dec. 31, 2013
COMMITMENTS AND CONTINGENCIES [Abstract]	'
COMMITMENTS AND CONTINGENCIES	'
	(11) COMMITMENTS AND CONTINGENCIES
		The Partnership is a party to certain actions directly arising from its normal business operations.  While the ultimate outcome is not presently determinable with certainty, the Partnership believes that the resolution of these matters will not have a material adverse effect on its financial statements.
		The Partnership leases its properties to tenants under operating lease agreements, certain of which require tenants at the industrial flex and warehouse distribution properties to pay all or part of certain operating and other expenses of the property.  The minimum future rentals to be received in respect of non-cancelable commercial operating leases with unexpired terms in excess of one year as of December 31, 2012 are $1,844,537 for 2013; $1,615,523 for 2014; $1,241,688 for 2015; $931,266 for 2016; $- for 2017 and $0 for 2018.
		Pursuant to the original investment agreement, the Partnership may be called upon to contribute, in cash, an additional $3,720,000 to the capital of Omaha, as and when required, as determined by the Manager.  In addition, the Partnership shall not have any liability to restore any negative balance in its capital account.
		Should a default occur by Omaha on its unsecured credit facility, the lender would not have any recourse to the Partnership and will look solely to Omaha's membership interest in Sentinel White Plains LLC.  Sentinel White Plains LLC is a wholly owned subsidiary of Sentinel Omaha LLC and holds the assets and liabilities of the Omaha properties through wholly owned single asset limited partnerships or limited liability companies.

SCHEDULE_III_REAL_ESTATE_AND_A

SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION	12 Months Ended
	Dec. 31, 2013
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION [Abstract]	'
SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION [Text Block]	'
	SB PARTNERS
	SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION
	31-Dec-12
	Column A	Column B					Column C				Column D
				Initial Cost to the Registrant
	Description	Encumbrances		Land					Total
							Buildings and
							Improvements
											Costs
											Capitalized
											Subsequent
											to Acquisition
	INDUSTRIAL FLEX
	Minnesota -
	Maple Grove (Eagle Lake Business Center IV)	$	-	$	470,000		$	4,243,385	$	4,713,385	$	623,588
	DISTRIBUTION CENTER
	Minnesota -
	Lino Lakes (435 Park Court)		10,000,000		1,515,000			13,760,390		15,275,390		20,646
		$	10,000,000	$	1,985,000		$	18,003,775	$	19,988,775	$	644,234
	Column A			Column E					Column F
	Gross amount at which Carried at End of Year
	(Notes a & c)
	Description	Land					Total
				Buildings and
				Improvements					Accumulated
									Depreciation
									(Notes b & d)
	INDUSTRIAL FLEX
	Minnesota -
	Maple Grove (Eagle Lake Business Center IV)	$	470,000	$	4,866,973		$	5,336,973	$	1,504,373
	DISTRIBUTION CENTER
	Minnesota -
	Lino Lakes (435 Park Court)		1,515,000		13,781,036			15,296,036		2,916,579
		$	1,985,000	$	18,648,009		$	20,633,009	$	4,420,952
	SB PARTNERS
	SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION - CONTINUED
	31-Dec-12
	Column A	Column G		Column H		Column I
	Description
		Date of		Date
		Construction		Acquired
						Life on which
						Depreciation in
						Latest Statement
						of Operations
						is Computed
	INDUSTRIAL FLEX
	Minnesota -
	Maple Grove (Eagle Lake Business Center IV)	$	2000	Jun-02		7 to 39 years
	DISTRIBUTION CENTER
	Minnesota -
	Lino Lakes (435 Park Court)	$	2004	Oct-05		7 to 39 years
	NOTES TO SCHEDULE III:
		2012		2011			2010
	(a) Reconciliation of amounts shown in Column E:
	Balance at beginning of year	$	20,566,164	$	20,566,164		$	20,545,518
	Additions -
	Cost of improvements (reimbursements)		66,845		0			20,646
	Deductions -
	Sales		0		0			0
	Balance at end of year	$	20,633,009	$	20,566,164		$	20,566,164
	(b) Reconciliation of amounts shown in Column F:
	Balance at beginning of year	$	3,931,815	$	3,437,522		$	2,943,492
Additions -
Depreciation expense for the year		489,137		494,293			494,030
Deductions -
Sales		0		0			0
	$	4,420,952	$	3,931,815		$	3,437,522
(c) Aggregate cost basis for Federal income tax reporting purposes	$	20,124,541	$	20,057,696		$	20,057,696
(d) Accumulated depreciation for Federal income tax reporting purposes	$	5,061,514	$	4,573,006		$	4,102,568

ORGANIZATION_AND_SIGNIFICANT_A1

ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)	12 Months Ended
	Dec. 31, 2013
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Abstract]	'
Consolidation of Subsidiaries, Basis of Accounting, Revenue Recognition, Use of Estimates	'
		(a)	The accompanying consolidated financial statements include the accounts of SB Partners and its subsidiaries.  All significant intercompany accounts and transactions have been eliminated.  The consolidated financial statements are prepared using the accrual basis of accounting in accordance with accounting principles generally accepted in the United States of America.  Revenues are recognized as earned and expenses are recognized as incurred.  The preparation of financial statements in conformity with such principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Consolidation, Variable Interest Entity	'
		(b)	In connection with the mortgage financing on certain of its properties, the Partnership placed the assets and liabilities of the properties into single asset limited partnerships, limited liability companies or land trusts which hold title to the properties.  The Partnership has effective control over such entities and holds 100% of the beneficial interest.  Accordingly, the financial statements of these subsidiaries are consolidated with those of the Partnership.
Buildings, Furnishings and Improvements, and Investments in Real Estate	'
	Buildings and Improvements    5 to 40 years
	Furnishings                 5 to  7 years
	Investments in real estate are carried at historical cost and reviewed periodically for impairment. Expenditures for maintenance and repairs are expensed as incurred.  Expenditures for improvements, renewals and betterments, which increase the useful life of the real estate, are capitalized.  Upon retirement or sale of property, the related cost and accumulated depreciation are removed from the accounts.  Amortization of deferred financing and refinancing costs is computed by amortizing the cost on a straight-line basis over the terms of the related mortgage notes.
Real Estate Properties Impairment	'
		(d)	Real estate properties are regularly evaluated on a property by property basis to determine if it is appropriate to write down carrying values to recognize an impairment of value.  Impairment is determined by calculating the sum of the estimated undiscounted future cash flows including the projected undiscounted future net proceeds from the sale of the property.  In the event such sum is less than the net carrying value of the property, the property will be written down to estimated fair value.  Based on the Partnership's long-term hold strategy for its investments in real estate, the carrying value of its properties at December 31, 2013 is estimated to be fully realizable.
Real Estate Held for Sale	'
		(e)	Real estate held for sale is carried at the lower of cost or fair value less selling costs.  Upon determination that a property is held for sale, depreciation of such property is no longer recorded.
Cash Equivalents	'
		(f)	For financial reporting purposes, the Partnership considers all highly liquid, short-term investments with original maturities of three months or less when purchased to be cash equivalents.
		(g)	The Partnership accounts for its investment in Sentinel Omaha, LLC at fair value.   Determination of the fair value of Omaha involves numerous estimates and subjective judgments that are subject to change in response to current and future economic and market conditions, including, among other things, demand for residential apartments, competition, and operating cost levels such as labor, energy costs and real estate taxes.  Judgments regarding these factors are not subject to precise quantification or verification and may change from time to time as economic and market factors change.  (see Note 5)
		(h)	Tenant leases at the multifamily properties owned by Omaha generally have terms of one year or less.  Rental income at the multifamily properties is recognized when earned pursuant to the terms of the leases with tenants.  Tenant leases at the industrial flex and warehouse distribution properties have terms that exceed one year.  Rental income at the industrial flex and warehouse distribution properties is recognized on a straight-line basis over the terms of the leases.
Investment in Sentinel Omaha, LLC	'
Tenant Leases	'
Gains on Sales of Investments in Real Estate	'
		(i)	Gains on sales of investments in real estate are recognized in accordance with accounting principles generally accepted in the United States of America applicable to sales of real estate which require minimum levels of initial and continuing investment by the purchaser, and certain other tests be met, prior to the full recognition of profit at the time of the sale.  When the tests are not met, gains on sales are recognized on either the installment or cost recovery methods.
Income Tax	'
		(j)	Each partner is individually responsible for reporting its share of the Partnership's taxable income or loss.  Accordingly, no provision has been made in the accompanying consolidated financial statements for Federal, state or local income taxes.
		(k)	Net income per unit of partnership interest has been computed based on the weighted average number of units of partnership interest outstanding during each year.  There were no potentially dilutive securities outstanding during each year.
Business Segments	'
		(l)	The Partnership is engaged in only one industry segment, real estate investment, and therefore information regarding industry segments is not applicable and is not included in these consolidated financial statements.

ORGANIZATION_AND_SIGNIFICANT_A2

ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Tables)	12 Months Ended
	Dec. 31, 2013
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Abstract]	'
Estimated Useful Lives of Related Properties	'
		(c)	Depreciation of buildings, furnishings and improvements is computed using the straight-line method of depreciation, based upon the estimated useful lives of the related properties, as follows:

INVESTMENTS_IN_REAL_ESTATE_Tab

INVESTMENTS IN REAL ESTATE (Tables)	12 Months Ended
	Dec. 31, 2013
INVESTMENTS IN REAL ESTATE [Abstract]	'
Cost Basis and Accumulated Depreciation of Real Estate Investments	'
	The following is the cost basis and accumulated depreciation of the real estate investments owned by the Partnership as of December 31, 2013 and 2012:
					Real Estate at Cost
	Type			Description	12/31/13		12/31/12
		No. of	Year of
		Prop.	Acquisition
	Industrial flex property	1	2002	60,345	$	5,336,973	$	5,270,128
	Warehouse distribution property	1	2005	226,000		15,296,036		15,296,036
	Total cost					20,633,009		20,566,164
	Less: Accumulated depreciation					-4,420,952		-3,931,815
	Net book value				$	16,212,057	$	16,634,349

REAL_ESTATE_HELD_FOR_SALE_Tabl

REAL ESTATE HELD FOR SALE (Tables)	12 Months Ended
	Dec. 31, 2013
REAL ESTATE HELD FOR SALE [Abstract]	'
Various Components of Revenue and Expenses from Discontinued Operations	'
	(5) INVESTMENT SENTINEL OMAHA, LLC

INVESTMENT_IN_SENTINEL_OMAHA_L1

INVESTMENT IN SENTINEL OMAHA, LLC (Tables)	12 Months Ended
	Dec. 31, 2013
INVESTMENT IN SENTINEL OMAHA, LLC [Abstract]	'
Condensed Financial Statements of Omaha	'
	The following are the audited condensed financial statements (000's omitted) of Omaha as of December 31, 2013 and 2012 and for each of the three years in the period ended December 31, 2012.
	Balance Sheet	2013		2012
	Investment in real estate properties, at fair value	$	267,600	$	302,900
	Other assets		9,996		7,056
	Debt		-266,254		-305,623
	Other liabilities		-5,779		-5,512
	Members' equity (deficit)	$	5,563	$	-1,179
	Statement of Operations	2013		2012		2011
	Rent and other income	$	39,179	$	42,539	$	45,943
	Real estate operating expenses		-20,070		-22,526		-24,463
	Other expenses		-13,187		-15,047		-17,245
	Net unrealized gains and (losses)		26,691		-12,727		1,379
	Net realized (losses)		-25,871		-4,573		-8,156
	Net income (loss)	$	6,742	$	-12,334	$	-2,542

MORTGAGE_NOTES_AND_UNSECURED_L1

MORTGAGE NOTES AND UNSECURED LOAN PAYABLE (Tables)	12 Months Ended
	Dec. 31, 2013
MORTGAGE NOTES AND UNSECURED LOAN PAYABLE [Abstract]	'
Mortgage Notes and Unsecured Loan Payable	'
	Mortgage notes payable consist of the following non-recourse first liens:
	Net Carrying Amount
	December 31,
	Property				Maturity Date					2013		2012
			Interest Rate					Amount Due
			Rate			Annual		at Maturity
						Installment
						Payments
	Mortgage note and unsecured loan payable:
	Lino Lakes (a)			5.80%	October, 2015	$	580,000	$	10,000,000	$	10,000,000	$	10,000,000
	Bank Loan (b):
	Note A										3,967,009		3,983,464
	Note B										6,000,000		6,000,000
										$	19,967,009	$	19,983,464
	(a) Annual installment payments include interest only.
		(b) On September 17, 2007, the Partnership entered into a bank loan (the "Loan") with a bank ("Holder") in the amount of $22,000,000, which matured on October 1, 2008 and provided for interest only monthly payments based upon LIBOR plus 1.95%.  The Holder of the unsecured debt formally
	extended the maturity to February 28, 2009 and had entered into discussions as to terms for extending the debt on a longer term basis.
Principal Payments on Mortgage Notes and Unsecured Loan Payable	'
	Scheduled principal payments on mortgage notes and unsecured loan payable are as follows:
	2013	$	3,967,009
	2014		10,000,000
	2015		-
	2016		-
	2017		6,000,000
	Thereafter		-
	Total	$	19,967,009

QUARTERLY_FINANCIAL_INFORMATIO1

QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables)	12 Months Ended
	Dec. 31, 2013
QUARTERLY FINANCIAL INFORMATION (UNAUDITED) [Abstract]	'
Summarized Quarterly Financial Data	'
	Year ended December 31, 2012	Revenues
				Loss from				Equity Income
				Continuing		Loss from		(Loss) on
				Operations		Continuing		Investment
						Operations
						Per Unit
	First Quarter	$	623,087	$	-272,785	$	-35.18	$	2,207,401
	Second Quarter		626,103		-296,015		-38.18		2,392,276
	Third Quarter		629,145		-266,622		-34.39		-58,597
	Fourth Quarter		630,939		-267,817		-34.55		-2,872,128
	Year ended December 31, 2011
	First Quarter	$	639,952	$	-280,521	$	-36.18	$	3,292,398
	Second Quarter		642,766		-261,154		-33.68		-1,151,234
	Third Quarter		567,187		-318,227		-41.04		-5,487,608
	Fourth Quarter		619,948		-245,491		-31.68		-

FEDERAL_INCOME_TAX_INFORMATION1

FEDERAL INCOME TAX INFORMATION (UNAUDITED) (Tables)	12 Months Ended
	Dec. 31, 2013
FEDERAL INCOME TAX INFORMATION (UNAUDITED) [Abstract]	'
Reconciliation of Net (Loss) For Financial Reporting Purposes to Net (Loss) For Federal Income Tax Reporting Purposes	'
	A reconciliation of net (loss) for financial reporting purposes to net (loss) for Federal income tax reporting purposes is as follows:
		For the Years Ended December 31,
		2013		2012		2011
	Net loss for financial reporting purposes	$	-1,103,239	$	-1,105,393	$	-1,027,941
	Adjustment to net loss on sale of investment in real estate property to reflect differences between tax and financial reporting bases of assets and liabilities		2,758,177		727,932		913,791
	Difference between tax and financial statement equity in net loss of investment		-8,773,783		-3,529,185		-4,673,857
	Accrued investment management fees, mortgage interest and partnership administrative costs not expensed for tax purposes		774,618		1,279,187		0
	Difference between tax and financial statement depreciation		-15,451		1,091		-15,831
	Net loss for Federal income tax reporting purposes	$	-6,359,678	$	-2,626,368	$	-4,803,838
	Net ordinary loss for Federal income tax reporting purposes:	$	-1,356,740	$	-1,982,373	$	-3,588,539
	Net capital (Sec. 1231) (loss) for Federal income tax reporting purposes:		-5,002,938		-643,995		-1,215,299
		$	-6,359,678	$	-2,626,368	$	-4,803,838
	Weighted average number of units of limited partnership  interest outstanding		7,753		7,753		7,753

ORGANIZATION_AND_SIGNIFICANT_A3

ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
		Segment
Property, Plant and Equipment [Line Items]	'	'
Beneficial interest percentage of partnership over the entities (in hundredths)	100.00%	'
Maturity period of instruments considered to be cash and cash equivalent	'	'90 days
Lease term	'	'1 year
Number of segments	'	1
Building and Improvements [Member] | Minimum [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Estimated useful life of related properties	'P5Y	'
Building and Improvements [Member] | Maximum [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Estimated useful life of related properties	'P40Y	'
Furnishings [Member] | Minimum [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Estimated useful life of related properties	'P5Y	'
Furnishings [Member] | Maximum [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Estimated useful life of related properties	'P7Y	'

INVESTMENT_MANAGEMENT_AGREEMEN1

INVESTMENT MANAGEMENT AGREEMENT (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012
				General Partner [Member]
Percentage of management fee (in hundredths)	'	'	'	2.00%
Management fee percentage, other than real estate (in hundredths)	'	'	'	0.50%
Management fees	$857,041	$858,926	$756,013	'
Deferred amount earned	$430,618	$437,293	'	'
Percentage of cash distribution in excess of the annual distribution (in hundredths)	'	'	'	25.00%

INVESTMENTS_IN_REAL_ESTATE_Det

INVESTMENTS IN REAL ESTATE (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
				Industrial flex property [Member]	Industrial flex property [Member]	Warehouse distribution property [Member]	Warehouse distribution property [Member]
				Property		Property
				sqft		sqft
Real Estate and Accumulated Depreciation [Line Items]	'	'	'	'	'	'	'
No. of Prop.	'	'	'	1	'	1	'
Year of Acquisition	'	'	'	'2002	'	'2005	'
Description (in square feet)	'	'	'	60,345	'	226,000	'
Real Estate at cost, Total cost	$20,633,009	$20,566,164	$20,929,767	$5,336,973	$5,270,128	$15,296,036	$15,296,036
Less: Accumulated depreciation	-4,420,952	-3,931,815	'	'	'	'	'
Total Real Estate Assets	$16,212,057	$16,634,349	'	'	'	'	'

REAL_ESTATE_HELD_FOR_SALE_Deta

REAL ESTATE HELD FOR SALE (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
REAL ESTATE HELD FOR SALE [Abstract]	'	'	'	'
Operating revenue	$0	$0	'	$0
Operating expenses	0	0	2,305	'
Income (Loss) from discontinued operations	$0	$0	($2,305)	'

REAL_ESTATE_TRANSACTIONS_Detai

REAL ESTATE TRANSACTIONS (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
REAL ESTATE TRANSACTIONS [Abstract]	'	'	'	'
Proceeds from sale of real estate property, in cash	'	'	'	$19,500,000
Mortgage notes on real estate	'	'	'	6,477,000
Carrying value of real estate property	'	'	'	19,063,029
Sales	0	0	0	'
Net loss on sale of real estate property	0	0	0	46,045
Closing costs of real estate property sales	'	'	'	483,016
Historical cost of real estate property sold	$20,633,009	$20,566,164	'	$20,929,767

INVESTMENT_IN_SENTINEL_OMAHA_L2

INVESTMENT IN SENTINEL OMAHA, LLC (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012
	Property
	Market
Schedule of Equity Method Investments [Line Items]	'	'	'	'
Investment amount	$37,200,000	'	'	'
Ownership interest in Omaha (in hundredths)	30.00%	'	'	'
Number of multifamily properties	14	'	'	'
Number of markets	10	'	'	'
Maturity date of unsecured loan	31-Dec-17	'	'	'
Extended maturity date of unsecured loan	30-Sep-13	'	'	'
Balance Sheet [Abstract]	'	'	'	'
Investment in real estate properties, at fair value	267,600	'	'	302,900
Other assets	9,996	'	'	7,056
Debt	-266,254	'	'	-305,623
Other liabilities	-5,779	'	'	-5,512
Member's Equity	5,563	'	'	-1,179
Statement of Operations [Abstract]	'	'	'	'
Rent and other income	39,179	42,539	45,943	'
Real estate operating expenses	-20,070	-22,526	-24,463	'
Other income and expenses	-13,187	-15,047	-17,245	'
Net unrealized gains and (losses)	26,691	-12,727	1,379	'
Net realized gains and (losses)	-25,871	-4,573	-8,156	'
Net loss	$6,742	($12,334)	($2,542)	'
Percentage reserved related to investments in Omaha distributions (in hundredths)	100.00%	'	'	'

MORTGAGE_NOTES_AND_UNSECURED_L2

MORTGAGE NOTES AND UNSECURED LOAN PAYABLE (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Debt Instrument [Line Items]	'		'		'
Maturity Date	31-Dec-17		'		'
Net Carrying Amount	$19,967,009		$19,983,464		'
Repayment of unsecured loan payable	16,455		86,106		11,930,430
Security interest on the Partnership's property, maximum	5,000,000		'		'
Principal payments on mortgage notes and unsecured loan payable [Abstract]	'		'		'
2013	3,967,009		'		'
2014	10,000,000		'		'
2015	0		'		'
2016	0		'		'
2017	6,000,000		'		'
Thereafter	0		'		'
Total	19,967,009		19,983,464		'
Mortgage Notes [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Frequency of Installment Payments	'annual		'		'
Mortgage Notes [Member] | Lino Lakes [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Interest Rate (in hundredths)	5.80%	[1]	'		'
Maturity Date	1-Oct-15	[1]	'		'
Installment Payments	580,000	[1]	'		'
Original amount of loan	10,000,000	[1]	'		'
Net Carrying Amount	10,000,000	[1]	10,000,000	[1]	'
Principal payments on mortgage notes and unsecured loan payable [Abstract]	'		'		'
Total	10,000,000	[1]	10,000,000	[1]	'
Mortgage Notes [Member] | Note A [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Net Carrying Amount	'		6,000,000		'
Principal payments on mortgage notes and unsecured loan payable [Abstract]	'		'		'
Total	'		6,000,000		'
Bank Loan [Member] | Note A [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Interest Rate (in hundredths)	5.00%		5.00%		'
Maturity Date	31-Jul-14		29-Apr-18		'
Net Carrying Amount	3,967,009	[2]	3,983,464	[2]	'
Repayment of unsecured loan payable	16,455		86,106		'
Number of notes	2		2		'
Number of extension options	2		3		'
Term of extension options	'1 year		'1 year		'
Date of first required principal payment, if maturity date is extended	1-Apr-15		'		'
First fixed principal payment required, if maturity date is extended	9,570		'		'
First fixed principal payment required, after orignal maturity date	30,000		'		'
Principal payments on mortgage notes and unsecured loan payable [Abstract]	'		'		'
Total	3,967,009	[2]	3,983,464	[2]	'
Bank Loan [Member] | Note B [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Net Carrying Amount	6,000,000	[2]	6,000,000	[2]	'
Principal payments on mortgage notes and unsecured loan payable [Abstract]	'		'		'
Total	6,000,000	[2]	6,000,000	[2]	'
Bank Loan [Member] | Unsecured [Member]	'		'		'
Debt Instrument [Line Items]	'		'		'
Maturity Date	1-Oct-08		'		'
Original amount of loan	22,000,000		'		'
Basis spread on variable interest rate (in hundredths)	1.95%		'		'
Variable rate basis	'Libor		'		'
Extended maturity date	28-Feb-09		'		'
Repayment of unsecured loan payable	11,930,430		'		'
Unsecured credit facility	$10,069,570		'		'
[1]	Annual installment payments include interest only.
[2]	On September 17, 2007, the Partnership entered into a bank loan (the bLoanb) with a bank (bHolderb) in the amount of $22,000,000, which matured on October 1, 2008 and provided for interest only monthly payments based upon LIBOR plus 1.95%.B B The Holder of the unsecured debt formally extended the maturity to February 28, 2009 and had entered into discussions as to terms for extending the debt on a longer term basis.

QUARTERLY_FINANCIAL_INFORMATIO2

QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summarized quarterly financial data [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Revenues	$630,939	$629,145	$626,103	$623,087	$619,948	$567,187	$642,766	$639,952	$2,509,274	$2,469,853	$2,500,906
Loss from Operations	-267,817	-266,622	-296,015	-272,785	-245,491	-318,227	-261,154	-280,521	-1,103,239	-1,105,393	-1,025,636
Loss from Operations Per Unit (in dollars per unit)	($34.55)	($34.39)	($38.18)	($35.18)	($31.68)	($41.04)	($33.68)	($36.18)	($142.30)	($142.58)	($132.59)
Equity Income (Loss) on Investment	($2,872,128)	($58,597)	$2,392,276	$2,207,401	$0	($5,487,608)	($1,151,234)	$3,292,398	$1,668,952	($3,346,444)	($762,632)

FEDERAL_INCOME_TAX_INFORMATION2

FEDERAL INCOME TAX INFORMATION (UNAUDITED) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
FEDERAL INCOME TAX INFORMATION (UNAUDITED) [Abstract]	'	'	'
Net loss for financial reporting purposes	($1,103,239)	($1,105,393)	($1,027,941)
Adjustment to net loss on sale of investment in real estate property to reflect differences between tax and financial reporting bases of assets and liabilities	2,758,177	727,932	913,791
Difference between tax and financial statement equity in net loss of investment	-8,773,783	-3,529,185	-4,673,857
Accrued investment management fees, mortgage interest and partnership administrative costs not expensed for tax purposes	774,618	1,279,187	0
Difference between tax and financial statement depreciation	-15,451	1,091	-15,831
Net loss for Federal income tax reporting purposes	-6,359,678	-2,626,368	-4,803,838
Net ordinary loss for Federal income tax reporting purposes:	-1,356,740	-1,982,373	-3,588,539
Net capital (Sec. 1231) (loss) for Federal income tax reporting purposes:	-5,002,938	-643,995	-1,215,299
Net loss for Federal income tax reporting purposes	-6,359,678	-2,626,368	-4,803,838
Weighted average number of units of limited partnership interest outstanding (in shares)	7,753	7,753	7,753
Partnership's assets for tax basis	16,333,404	17,953,793	'
Partnership's liabilities for tax basis	$22,382,448	$21,536,888	'

MANAGEMENT_SERVICES_Details

MANAGEMENT SERVICES (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2010
MANAGEMENT SERVICES [Abstract]	'	'	'
Management services billings to partnership	$128,139	$129,919	$124,482
Annual fee paid for management services	$54,000	$9,000	$0

FAIR_VALUE_OF_FINANCIAL_INSTRU1

FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
FAIR VALUE OF FINANCIAL INSTRUMENTS [Abstract]	'	'
Fair value of the mortgage notes and unsecured loan payable	$19,967,009	$19,983,464

COMMITMENTS_AND_CONTINGENCIES_

COMMITMENTS AND CONTINGENCIES (Details) (USD $)	Dec. 31, 2013
Minimum future rentals to be received [Abstract]	'
2018	$0
2013	1,844,537
2014	1,615,523
2015	1,241,688
2016	931,266
2017	0
Additional capital to be called	$3,720,000

SUBSEQUENT_EVENT_Details

SUBSEQUENT EVENT (Details) (Subsequent Event [Member])	12 Months Ended
	Dec. 31, 2013
Subsequent Event [Member]	'
Subsequent Event [Line Items]	'
Reduced pay rate on portion of unsecured loan	'floating rate of 200 basis points over LIBOR
Increase in additional accrual rate on portion of unsecured loan	'500 basis points over LIBOR

SCHEDULE_III_REAL_ESTATE_AND_A1

SCHEDULE III - REAL ESTATE AND ACCUMULATED DEPRECIATION (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Real Estate and Accumulated Depreciation [Line Items]	'	'	'
Encumbrances	$10,000,000	'	'
Initial Cost to the Registrant [Abstract]	'	'	'
Land	1,985,000	'	'
Buildings and Improvements	18,003,775	'	'
Total	19,988,775	'	'
Costs Capitalized Subsequent to Acquisition	644,234	'	'
Gross amount at which Carried at End of Year [Abstract]	'	'	'
Land	1,985,000	'	'
Buildings and Improvements	18,648,009	'	'
Total	20,633,009	20,566,164	20,566,164
Accumulated Depreciation	4,420,952	3,931,815	'
Reconciliation of amounts shown in Column E: [Abstract]	'	'	'
Balance at beginning of year	20,566,164	20,566,164	20,545,518
Additions - [Abstract]	'	'	'
Cost of improvements (reimbursements)	66,845	0	20,646
Deductions - [Abstract]	'	'	'
Sales	0	0	0
Balance at end of year	20,633,009	20,566,164	20,566,164
Reconciliation of amounts shown in Column F: [Abstract]	'	'	'
Balance at beginning of year	3,931,815	3,437,522	2,943,492
Additions - [Abstract]	'	'	'
Depreciation expense for the year	489,137	494,293	494,030
Deductions - [Abstract]	'	'	'
Sales	0	0	0
Balance at end of year	4,420,952	3,931,815	3,437,522
Aggregate cost basis for Federal income tax reporting purposes	20,124,541	20,057,696	20,057,696
Accumulated depreciation for Federal income tax reporting purposes	5,061,514	4,573,006	4,102,568
Maple Grove (Eagle Lake Business Center IV) [Member] | INDUSTRIAL FLEX Minnesota [Member]	'	'	'
Real Estate and Accumulated Depreciation [Line Items]	'	'	'
Encumbrances	0	'	'
Initial Cost to the Registrant [Abstract]	'	'	'
Land	470,000	'	'
Buildings and Improvements	4,243,385	'	'
Total	4,713,385	'	'
Costs Capitalized Subsequent to Acquisition	623,588	'	'
Gross amount at which Carried at End of Year [Abstract]	'	'	'
Land	470,000	'	'
Buildings and Improvements	4,866,973	'	'
Total	5,336,973	'	'
Accumulated Depreciation	1,504,373	'	'
Date of Construction	1-Jan-00	'	'
Date Acquired	1-Jun-02	'	'
Deductions - [Abstract]	'	'	'
Balance at end of year	5,336,973	'	'
Lino Lakes (435 Park Court) [Member] | DISTRIBUTION CENTER Minnesota [Member]	'	'	'
Real Estate and Accumulated Depreciation [Line Items]	'	'	'
Encumbrances	10,000,000	'	'
Initial Cost to the Registrant [Abstract]	'	'	'
Land	1,515,000	'	'
Buildings and Improvements	13,760,390	'	'
Total	15,275,390	'	'
Costs Capitalized Subsequent to Acquisition	20,646	'	'
Gross amount at which Carried at End of Year [Abstract]	'	'	'
Land	1,515,000	'	'
Buildings and Improvements	13,781,036	'	'
Total	15,296,036	'	'
Accumulated Depreciation	2,916,579	'	'
Date of Construction	1-Jan-04	'	'
Date Acquired	1-Oct-05	'	'
Deductions - [Abstract]	'	'	'
Balance at end of year	$15,296,036	'	'
Minimum [Member] | Maple Grove (Eagle Lake Business Center IV) [Member] | INDUSTRIAL FLEX Minnesota [Member]	'	'	'
Gross amount at which Carried at End of Year [Abstract]	'	'	'
Life on which Depreciation in Latest Statement of Operations is Computed	'7 years	'	'
Minimum [Member] | Lino Lakes (435 Park Court) [Member] | DISTRIBUTION CENTER Minnesota [Member]	'	'	'
Gross amount at which Carried at End of Year [Abstract]	'	'	'
Life on which Depreciation in Latest Statement of Operations is Computed	'7 years	'	'
Maximum [Member] | Maple Grove (Eagle Lake Business Center IV) [Member] | INDUSTRIAL FLEX Minnesota [Member]	'	'	'
Gross amount at which Carried at End of Year [Abstract]	'	'	'
Life on which Depreciation in Latest Statement of Operations is Computed	'39 years	'	'
Maximum [Member] | Lino Lakes (435 Park Court) [Member] | DISTRIBUTION CENTER Minnesota [Member]	'	'	'
Gross amount at which Carried at End of Year [Abstract]	'	'	'
Life on which Depreciation in Latest Statement of Operations is Computed	'39 years	'	'